The results of this study help to evaluate the sensitiveness of 3D printed polymer structures against fatigue crack growth. Fatigue crack propagation (FCP) experiments are very sensitive in regard to process-induced anisotropy. It reveals the potential of 3D printing with regards to its development from a "rapid prototyping" to a "rapid manufacturing" technique for technical products. The results of the investigations show that the FCP properties of 3D printed components are comparable to injection molded of similar material and geometry.